A semi-boneless ham is a piece of hog meat that has part of the bone removed to make it easier to carve. Part of the bone is left in the meat to enhance the flavor of the ham.
Semi-boneless hams are sold as both whole hams and half hams. Other types of ham include boneless and bone-in. The portion of the bone removed from semi-boneless has is called the aitch bone, or hip bone, which can be spotted by looking for a small, dark patch of meat on one edge of the cut ham surrounding a hard white bone circle with a dark marrow center.